Stable carbon, nitrogen and sulphur isotope analysis of permafrost preserved human hair from rescue excavations (2009, 2010) at the precontact site of Nunalleq, Alaska [PDF]
, 2018 Acknowledgments This work was funded by an Arts and Humanities Research Council (AH/K006029/1) grant awarded to Rick Knecht, Kate Britton and Charlotta Hillerdal (Aberdeen); an AHRC-LabEx award (AH/N504543/1) to KB, RK, Keith Dobney (Liverpool) and ...
Britton, Kate +5 more
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Frontiers in Marine Science, 2017 Nitrogen is a key limiting nutrient that influences marine productivity and carbon sequestration in the ocean via the biological pump. In this study, we present the first estimates of nitrogen cycling in a coupled 3D ocean-biogeochemistry-isotope model ...
Christopher J. Somes +3 more
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Food fit for a Khan: Stable isotope analysis of the elite Mongol Empire cemetery at Tavan Tolgoi, Mongolia [PDF]
, 2014 The creation and expansion of the Mongol Empire during the thirteenth century A.D. brought with it many changes, both for the conquered peoples and for the conquerors themselves.
Fenner, Jack +2 more
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Solving the woolly mammoth conundrum: amino acid 15N-enrichment suggests a distinct forage or habitat [PDF]
, 2015 Understanding woolly mammoth ecology is key to understanding Pleistocene community dynamics and evaluating the roles of human hunting and climate change in late Quaternary megafaunal extinctions. Previous isotopic studies of mammoths’ diet and physiology
Longstaffe, Fred J +3 more
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Tellus: Series B, Chemical and Physical Meteorology, 2019 While dry and rain deposition of nitrate (NO3−) and ammonium (NH4+) are regularly assessed, fog deposition is often overlooked. This work assesses summer fog events contribution to nitrogen deposition and availability for forest ecosystems.
Carmen P. Vega +5 more
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Nitrogen isotopes in granite genesis
Chinese Science Bulletin, 1998 Nitrogen content is a very sensitive indicator of the sediment input in granite genesis. For S-type granites, the nitrogen isotopic compositions are controlled by the initial isotopic compositions of their provenances. For I-type granites, the nitrogen isotope signature may be derived from a minor sedimentary component due to assimilation or ...
Dachun Zhang +2 more
openaire +1 more source
Food webs in forest and pasture streams in the Waikato region, New Zealand: A study based on analyses of stable isotopes of carbon and nitrogen, and fish gut contents. [PDF]
, 1997 Stable isotopes of carbon (C) and nitrogen (N) were studied in 11 stream communities in the Waikato region of New Zealand. From comparisons of mean d13C and d15N values, food webs in the shaded, forest streams were clearly based on allochthonous material
Biggs B., Lester P. J., Main M. L.
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Zhipu XuebaoDetermination of nitrogen isotopes in natural samples plays an important role in scientific exploration of the global nitrogen cycle. However, compared with carbon isotope measurement, the accuracy of nitrogen isotope ratio determination is generally ...
Ye-kai WANG +4 more
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Ratio of natural isotopes of nitrogen. I. Primary results: soils of Dombes [Translation from: Revue d'Ecologie et de Biologie du Sol 14, 279-287, 1977] [PDF]
, 1980 Utilization of the heavy isotope of nitrogen as a tracer has found numerous applications in soil biology. It allows better definition of different stages of the nitrogen cycle, in particular the immobilization-mineralization cycle.
Chalamet, A. +2 more
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